"If this fight becomes a close fight, a good fight, I think the decision will go to Manny," heavyweight title-holder Deontay Wilder said. "You've got to keep in mind that the rematch is more money. They're making hella money now, but the rematch is more money, or even a draw of a good fight is more money."

Boxing history is littered with rematches, some more successful than others. What they generally have in common, though, is that the first fight was good enough to keep fans wanting more.

A draw Saturday would likely prompt a rematch, and many fans believe a Mayweather loss — ruining his undefeated record — would trigger a second fight, whereas a Mayweather victory would make a rematch less likely.